What is the study of the heart and its function in health and disease called?

The study of the heart and its function in health and disease is referred to as cardiology. This medical specialty focuses on diagnosing, treating, and preventing conditions related to the heart and blood vessels. Cardiology encompasses a wide range of topics, including heart failure, arrhythmias, congenital heart defects, and coronary artery disease, among others.

Understanding cardiology is essential for healthcare professionals and helps in managing and treating various cardiovascular diseases effectively. This field involves advanced training and knowledge about the heart's anatomy, physiology, and the pathological conditions that can affect its function.

The other options describe related but distinct concepts. Cardiologists are the medical doctors who specialize in cardiology, whereas cardiac rehabilitation refers to a structured program that helps patients recover and improve their cardiovascular health after heart-related events. Cardiac studies typically refer to specific diagnostic tests and assessments performed to evaluate heart function, rather than the broader field of study regarding the heart's functions and diseases itself.